# Compressed Air Calc by ALMiG vs Engine Calculator Plus

The clearest difference is review sentiment: Compressed Air Calc by ALMiG at 100% against Engine Calculator Plus's 13%. Compressed Air Calc by ALMiG also leads on price (Free vs $2.99) and rating (4.0 vs 3.3). Engine Calculator Plus's advantage is ratings volume (3 vs 1). On update cadence, ads, in-app purchases and device support there is nothing between them.

Compressed Air Calc by ALMiG is free to download; Engine Calculator Plus costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Compressed Air Calc by ALMiG holds the better App Store score, 4.0 against 3.3. Both are backed by a comparable volume of ratings — 1 and 3 respectively. Written reviews point the same way: 100% of Compressed Air Calc by ALMiG's written reviews are positive against 13% of Engine Calculator Plus's.

Compressed Air Calc by ALMiG ships an update every 50 months, Engine Calculator Plus every 48 months. The most recent releases landed on October 18, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Compressed Air Calc by ALMiG | Engine Calculator Plus |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | **[4.0 (1 ratings)](https://appshunter.io/ios/app/compressed-air-calc-by-almig/id1083092926/reviews)** | [3.3 (3 ratings)](https://appshunter.io/ios/app/engine-calculator-plus/id1355990764/reviews) |
| Number of ratings | 1 | **3** |
| Positive reviews | **100.0% of reviews** | 12.5% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 50 months | **Every 48 months** |
| Monetization | **Free** | Paid |
| Size | 7 MB | 2 MB |
| Requires iOS | **11.0** | 13 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ALMiG Kompressoren GmbH](https://appshunter.io/developer/1083092925) | [Nitrio](https://appshunter.io/developer/321121189) |

## What reviewers say

### Compressed Air Calc by ALMiG

[App page](https://appshunter.io/ios/app/compressed-air-calc-by-almig/id1083092926)

This app offers a suite of tools to optimize compressed air stations. It includes unit conversion, pressure drop calculation, condensate development, and receiver sizing. It also helps determine sound pressure levels and leakage quantities.

**Highlights:** Unit converter (pressure, volume, power, flow, energy, temp), Pressure drop calculation, Condensate development calculation, Receiver size calculation, Sound pressure level calculation, Leakage quantity determination

**Features:** macOS Compatibility

**In-app purchases:** none


### Engine Calculator Plus

[App page](https://appshunter.io/ios/app/engine-calculator-plus/id1355990764)

Calculate engine specifications for various car and plane engines, including displacement, compression ratio, and horsepower. Supports metric and imperial systems with a user-friendly interface and 3D engine visualization.

**Highlights:** Engine displacement calculation, Compression ratio calculation, Horsepower estimation, Metric and Imperial support, 3D engine display, Copyable results

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Compressed Air Calc by ALMiG free?

Compressed Air Calc by ALMiG is free to download, with no in-app purchases.

### Is Engine Calculator Plus free?

Engine Calculator Plus costs $2.99, with no in-app purchases.

### Which has better reviews, Compressed Air Calc by ALMiG or Engine Calculator Plus?

Compressed Air Calc by ALMiG is rated higher. Compressed Air Calc by ALMiG averages 4.0 out of 5 from 1 ratings, while Engine Calculator Plus averages 3.3 from 3 ratings.

### Do Compressed Air Calc by ALMiG or Engine Calculator Plus have ads?

Neither Compressed Air Calc by ALMiG nor Engine Calculator Plus shows ads.

### Which is updated more often, Compressed Air Calc by ALMiG or Engine Calculator Plus?

Compressed Air Calc by ALMiG ships an update every 50 months, and Engine Calculator Plus every 48 months. Most recently, Compressed Air Calc by ALMiG was updated on October 18, 2026 and Engine Calculator Plus on October 27, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*